Blar i Brage IMR på forfatter "Lindstrøm, Ulf"
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Humpback Whale (Megaptera novaeangliae) Song on a Subarctic Feeding Ground
Martin, Saskia C.; Aniceto, Ana Sofia; Ahonen, Heidi; Pedersen, Geir; Lindstrøm, Ulf (Peer reviewed; Journal article, 2021)Male humpback whales (Megaptera novaeangliae) are known to produce long complex sequences of structured vocalizations called song. Singing behavior has traditionally been associated with low latitude breeding grounds but ... -
Mink and fin whales along the Barents Sea shelf break - distribution, habitat and prey selection and competition
Skern-Mauritzen, Mette; Skaug, Hans Julius; Øien, Nils; Lindstrøm, Ulf (ICES CM Documents;2005/R:09, Working paper, 2005) -
Monitoring marine mammals using unmanned aerial vehicles: Quantifying detection certainty
Aniceto, Ana Sofia; Biuw, Martin; Lindstrøm, Ulf; Solbø, Stian; Broms, Fredrik Björn; Carroll, JoLynn (Peer reviewed; Journal article, 2018)Unmanned aerial vehicles (UAVs) are increasingly being recognized as potentially useful for detection of marine mammals in their natural habitats, but an important consideration is the associated uncertainties in animal ... -
Multiple configurations and fluctuating trophic control in the Barents Sea food-web
Sivel, Elliot Manuarii; Planque, Benjamin; Lindstrøm, Ulf; Yoccoz, Nigel G. (Peer reviewed; Journal article, 2021)The Barents Sea is a subarctic shelf sea which has experienced major changes during the past decades. From ecological time-series, three different food-web configurations, reflecting successive shifts of dominance of pelagic ... -
Multispecies functional response of the minke whale Balaenoptera acutorostrata based on small-scale foraging studies
Smout, Sophie; Lindstrøm, Ulf (Journal article; Peer reviewed, 2007-07-04)Atlantic minke whales are important predators in the Barents Sea ecosystem; capelin Mallotus villosus, krill Thysanoessa sp. and Meganyctephanes norvegica and herring Clupea harengus are their major prey. Their consumption ... -
Non-deterministic modelling of food-web dynamics
Planque, Benjamin; Lindstrøm, Ulf; Subbey, Samuel (Journal article; Peer reviewed, 2014-10-09)A novel approach to model food-web dynamics, based on a combination of chance (randomness) and necessity (system constraints), was presented by Mullon et al. in 2009. Based on simulations for the Benguela ecosystem, they ... -
Overexploitation, Recovery, and Warming of the Barents Sea Ecosystem During 1950–2013
Pedersen, Torstein; Mikkelsen, Nina; Lindstrøm, Ulf; Renaud, Paul Eric; Nascimento, Marcela C.; Blanchet, Marie-Anne; Ellingsen, Ingrid H.; Jørgensen, Lis L.; Blanchet, Hugues (Peer reviewed; Journal article, 2021)The Barents Sea (BS) is a high-latitude shelf ecosystem with important fisheries, high and historically variable harvesting pressure, and ongoing high variability in climatic conditions. To quantify carbon flow pathways ... -
Population structure of bycaught harbour porpoise (Phocoena phocoena) in Norway
Sanchez, Maria Quintela; Besnier, Francois; Seliussen, Bjørghild Breistein; Glover, Kevin; Lindstrøm, Ulf (Peer reviewed; Journal article, 2020) -
Preliminary results of the joint Russian-Norwegian airborne research of the Barents Sea in September-October 2002
Zabavnikov, V.B.; Chernook, V.I.; Zyryanov, S.V.; Egorov, S.A.; Nilssen, Kjell Tormod; Frie, Anne Kirstine; Corkeron, Peter; Lindstrøm, Ulf (IMR/PINRO joint report series, Research report, 2002)The conclusions given below are preliminary and will be refined after detailed processing of materials and data gained. 1. Large aggregations of harp seals were observed mostly in the near ice-edge zone, which was north ... -
Prey consumtion by Barents sea harp seals in the period 1990-2005
Lindstrøm, Ulf; Nilssen, Kjell Tormod; Haug, Tore (ICES CM documents, Working paper, 2006)The Barents Sea ecosystem has experienced major fluctuations in species abundance in the past 20-30 years. The mechanisms behind these fluctuations are complex and arise from numerous interactions between species and the ... -
Rapid Determination of Per- and Polyfluoroalkyl Substances (PFAS) in Harbour Porpoise Liver Tissue by HybridSPE®–UPLC®–MS/MS
Trimmel, Simone; Vike-Jonas, Kristine; Gonzalez, Susana Villa; Ciesielski, Tomasz Maciej; Lindstrøm, Ulf; Jenssen, Bjørn Munro; Asimakopoulos, Alexandros (Peer reviewed; Journal article, 2021)A rapid hybrid solid phase extraction (HybridSPE®) protocol tailored to ultra-performance liquid chromatography–electrospray ionization tandem mass spectrometry (UPLC®–ESI–MS/MS) analysis was developed for the determination ... -
Report from a krill focused survey with RV Kronprins Haakon and land-based predator work in Antarctica during 2018/2019
Krafft, Bjørn Arne; Bakkeplass, Kjell Gunnar; Berge, Terje; Biuw, Martin; Erices, Julio Alberto; Jones, Elizabeth Marie; Knutsen, Tor; Kubilius, Rokas; Kvalsund, Merete; Lindstrøm, Ulf; Macaulay, Gavin; Renner, Angelika; Rey, Alina; Søiland, Henrik; Wienerroither, Rupert; Ahonen, Heidi; Goto, Jade; Hoem, Nils; Huerta, Magdelena; Höfer, Juan; Iden, Oda; Jouanneau, William; Kruger, Lucas; Liholt, Håvard; Lowther, Andy; Makhado, Azwianewi B.; Mestre, Mireia; Narvestad, Audun; Oosthuisen, Chris; Rodrigues, Jose; Øyerhamn, Rune (Rapport fra havforskningen;2019 - 21, Research report, 2019)The primary objective for this krill research activity was twofold 1) to conduct a survey that provides updated estimates of the biomass and distribution of krill which are used in models to estimate sustainable yield in ... -
Ringed seal (Pusa hispida) diet on the west coast of Spitsbergen, Svalbard, Norway: during a time of ecosystem change
Bengtsson, Oskar; Lydersen, Christian; Kovacs, Kit M.; Lindstrøm, Ulf (Peer reviewed; Journal article, 2020)Global warming is causing Atlantification of water masses and concomitant changes in food webs in the Barents Sea region. To determine whether changes that have been documented at lower trophic levels are impacting the ... -
Small scale multi-species functional response of northeast Atlantic minke whales
Smout, Sophie; Lindstrøm, Ulf (ICES CM documents, Working paper, 2005) -
Studies of minke whale (Balaenoptera acutorostrata) ecology in the northeast Atlantic: Description of the 1993 scientific catch operations and preliminary results from stomach analyses and resource surveys
Haug, Tore; Lindstrøm, Ulf; Nilssen, Kjell Tormod; Røttingen, Ingolf (ICES CM Documents;1994/N:14, Working paper, 1994)Ecological studies of the Northeast Atlantic minke whale (Balaenoptera acutorostrata), initiated in 1992, were continued in 1993. The field work was carried out in spring (15 April-15 May), summer (15 June-12 July) and ... -
Studies of minke whale (Balaenoptera acutorostrata) ecology in the northeast Atlantic: Preliminary results from studies of diet and food availability during summer 1992
Haug, Tore; Gjøsæter, Harald; Lindstrøm, Ulf; Nilssen, Kjell Tormod (ICES CM Documents;1993/N:7, Working paper, 1993)Stomach content samples from 92 minke whales Balaenoptera acutorostrata, caught during scientific whaling operations in July-August 1992, were collected in five selected areas in Norwegian and adjacent waters. Preliminary ... -
Temporal Dynamics of Top Predators Interactions in the Barents Sea
Durant, Joël M.; Skern-Mauritzen, Mette; Krasnov, Yuri V.; Nikolaeva, Natalia G.; Lindstrøm, Ulf; Dolgov, Andrey V. (Journal article; Peer reviewed, 2014-11-03)The Barents Sea system is often depicted as a simple food web in terms of number of dominant feeding links. The most conspicuous feeding link is between the Northeast Arctic cod Gadus morhua, the world's largest cod stock ... -
Understanding what controls the spatial distribution of fish populations using a multi-model approach
Planque, Benjamin; Loots, Christophe; Petitgas, Pierre; Lindstrøm, Ulf; Vaz, Sandrine (Journal article; Peer reviewed, 2010-12-09)Understanding and predicting the distribution of organisms in heterogeneous environments lies at the heart of ecology. The spatial distribution of fish populations observed in the wild results from the complex interactions ... -
Use and selection of prey by harp seals during summer in the northern Barents Sea
Nilssen, Kjell Tormod; Lindstrøm, Ulf (ICES CM documents, Working paper, 2005)The aim of this study was analyse harp seals prey use and selection during summer in Svalbard waters. A total of 41, 34 and 58 (including 24 faeces samples) from animals were sampled in 1996, 1997 and 2004. Krill was the ... -
Vågehvalens beitevaner i våre økosystemer
Haug, Tore; Lindstrøm, Ulf (Ottar;nr. 280 - 2010, Journal article, 2010)Vågehvalen er et stort pattedyr selv om den er vår minste bardehval. Et stort, varmblodig dyr som lever i et kaldt hav trenger mye mat, så hva lever vågehvalen av? Hvorfor foretar den lange vandringer fra varmere farvann ...